Water Tank Capacities
Water Tank Capacities: 500 to 5000+ Gallons
Water tanks come in a handful of common capacities, and picking the right one starts with matching gallons to your need. This page indexes the sizes we carry most, from compact 500 gallon tanks up to a 5000 gallon water tank and larger, with a short note on what each size suits and a link to shop it. If you are still working out the number, our what size water tank do I need guide walks through the math, or browse the full large water storage tanks hub to compare every option.
Looking for vertical tanks?Most of the sizes above ship as vertical poly tanks. Shop the full range with live pricing, or send us your capacity for a quote.
500 Gallon Water Tanks
Compact storage for homes, cabins, and small yards where space is tight.
View 500 Gal2500 Gallon Water Tanks
Larger reserves for farms, irrigation, and light commercial use.
View 2500 Gal5000+ Gallon Water Tanks
High-capacity storage for commercial, agricultural, and bulk needs. Past this size, bulk water storage tanks take over.
View 5000 GalWater Tank Capacity Reference
A planning reference. Water weighs about 8.34 pounds per gallon.
| Capacity | Weight when full of water | Foundation to plan for | Typical material |
|---|---|---|---|
| 500 gallon | About 4,170 lb | Small level pad, fits most yards | Usually poly |
| 1000 gallon | About 8,340 lb | Level, compacted pad | Usually poly |
| 2500 gallon | 2500 = About 20,850 lb | Engineered pad, check ground bearing | Poly or steel |
| 5000 gallon | About 41,700 lb | Engineered pad or ring wall | Steel or bolted |
These are water weights, not tank weights, and they show why the pad matters as tanks get larger. Each product page lists that tank's own dimensions and empty weight.
Between two sizes?Work the number out from your demand and refill, or convert your tank dimensions to gallons.
Water Tank Size FAQs
What is the most common water tank size?
For household and small-farm use, 1000 gallons is the size we see chosen most: big enough for a real reserve, small enough to site and refill easily. Commercial buyers most often land at 5000 gallons and up, where deliveries by the truckload make sense.
How much does a 1000 gallon water tank hold and weigh?
It holds 1000 gallons, and the water alone weighs about 8.34 pounds per gallon, roughly 8,340 pounds when full, before the tank's own weight. The empty shipping weight varies by model and is listed on each product page, so check there when planning your pad and placement.
Which capacity is right for my use?
Start from how much water you use between refills, then add a margin for the days you want covered. The sections above note what each size typically suits, and the sizing guide walks through the calculation step by step if you want to work it from your own numbers.
